Rear splash guard for bicycles



FIG. 1 is a right side elevation view of a rear splash guard for bicycles showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a rear splash guard for bicycles, as shown. 